A satellite or artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. Satellites have a variety of uses, including communication relay, weather forecasting, navigation (GPS), broadcasting, scientific research, and Earth observation. Additional military uses are reconnaissance, early warning, signals intelligence and, potentially, weapon delivery. Other satellites include the final rocket stages that place satellites in orbit and formerly useful satellites that later become defunct.
A space telescope or space observatory is a telescope in outer space used to observe astronomical objects. Suggested by Lyman Spitzer in 1946, the first operational telescopes were the American Orbiting Astronomical Observatory, OAO-2 launched in 1968, and the Soviet Orion 1 ultraviolet telescope aboard space station Salyut 1 in 1971. Space telescopes avoid several problems caused by the atmosphere, including the absorption or scattering of certain wavelengths of light, obstruction by clouds, and distortions due to atmospheric refraction such as twinkling. Space telescopes can also observe dim objects during the daytime, and they avoid light pollution which ground-based observatories encounter. They are divided into two types: Satellites which map the entire sky, and satellites which focus on selected astronomical objects or parts of the sky and beyond. Space telescopes are distinct from Earth imaging satellites, which point toward Earth for satellite imaging, applied for weather analysis, espionage, and other types of information gathering.
This timeline of artificial satellites and space probes includes uncrewed spacecraft including technology demonstrators, observatories, lunar probes, and interplanetary probes. First satellites from each country are included. Not included are most Earth science satellites, commercial satellites or crewed missions.
The Brazilian Space Agency is the civilian authority in Brazil responsible for the country's space program. It operates a spaceport at Alcântara, and a rocket launch site at Barreira do Inferno. It is the largest and most prominent space agency in Latin America.
The Japan Aerospace Exploration Agency (JAXA) is the Japanese national air and space agency. Through the merger of three previously independent organizations, JAXA was formed on 1 October 2003. JAXA is responsible for research, technology development and launch of satellites into orbit, and is involved in many more advanced missions such as asteroid exploration and possible human exploration of the Moon. Its motto is One JAXA and its corporate slogan is Explore to Realize.
The Indian Space Research Organisation is the national space agency of India. It operates as the primary research and development arm of the Department of Space (DoS), which is directly overseen by the Prime Minister of India while the Chairman of ISRO also acts as the executive of DoS. ISRO is primarily responsible for performing tasks related to space-based operations, space exploration, international space cooperation and the development of related technologies. ISRO is one of the six government space agencies in the world that possesses full launch capabilities, can deploy cryogenic engines, can launch extraterrestrial missions and operate a large fleet of artificial satellites. ISRO is one of the four government space agencies to have soft landing (unmanned) capabilities.
India's remote sensing program was developed with the idea of applying space technologies for the benefit of humankind and the development of the country. The program involved the development of three principal capabilities. The first was to design, build and launch satellites to a Sun-synchronous orbit. The second was to establish and operate ground stations for spacecraft control, data transfer along with data processing and archival. The third was to use the data obtained for various applications on the ground.
The National Institute for Aerospace Technology "Esteban Terradas" is an autonomous agency of the Spanish public administration dependent on the Secretariat of State for Defence (SEDEF). It is responsible for the aerospace, aeronautics, hydrodynamics, and defense and security technologies research.
The Israel Space Agency is a governmental body, a part of Israel's Ministry of Science and Technology, that coordinates all Israeli space research programs with scientific and commercial goals.
The Institute for Unmanned Space Experiment Free Flyer (USEF) (財団法人無人宇宙実験システム研究開発機構) was a Japanese space agency, which was founded by the Ministry of International Trade and Industry in 1986. Unlike NASDA, ISAS, and NAL, it was not included in the JAXA organization, which was founded in 2003. The chairperson is Ichiro Taniguchi.
STSat-2A was a satellite launched by the Korea Aerospace Research Institute (KARI), the national space agency of South Korea, from the Naro Space Center in Goheung County, South Jeolla using the Naro-1 (KSLV-1) launch vehicle.
KITSAT-1 or KITSAT-A is the first South Korean satellite to be launched. Once launched, the satellite was given the nickname "Our Star". KITSAT-1 operated in a 818 miles (1,316 km) by 825 miles (1,328 km) low Earth orbit (LEO). Of the 12 satellites launched by South Korea, KITSAT-1 is in the highest orbit. While KITSAT-1 maintains equilibrium by gravity gradient forces, magnetic torque can be used to control attitude if needed. The forecasted lifespan of KITSAT-1 was only five years, but communication with the satellite was maintained for 12 years. Since the launch of KITSAT-1, South Korea launched an additional 36 satellites by 2020.
SRMSAT is a Nanosatellite built by students at Sri Ramaswamy Memorial University in India. The satellite is an Indian Technology demonstration and Earth observation satellite which is operated by the SRM Institute of Science and Technology. This nanosatellite was used to monitor Greenhouse gases in atmosphere.
Planetary Resources, Inc., formerly known as Arkyd Astronautics, was an American company that was formed on 1 January 2009, and reorganized and renamed in 2012. Its stated goal is to "expand Earth's natural resource base" by developing and deploying the technologies for asteroid mining. Following financial troubles caused by "delayed investment", it was announced on 31 October 2018, that the company's human assets were purchased by the blockchain software technology company ConsenSys, Inc. In May 2020, ConsenSys made all Planetary Resources intellectual property available to the public domain, and in June 2020, all the remaining hardware assets were auctioned off.
The Polish Space Agency is the space agency of Poland, administered by the Ministry of Development, Labour and Technology. It is a member of the European Space Agency. The agency is focused on developing satellite networks and space technologies in Poland. It was established on 26 September 2014, and its headquarters are located in Gdańsk, Poland.
Diwata-1 also known as PHL-Microsat-1 was a Philippine microsatellite launched to the International Space Station (ISS) on March 23, 2016, and was deployed into orbit from the ISS on April 27, 2016. It was the first Philippine microsatellite and the first satellite built and designed by Filipinos. It was followed by Diwata-2, launched in 2018.
Maya-1 was a Filipino nanosatellite. It was developed under the Philippine Scientific Earth Observation Microsatellite program (PHL-Microsat) and was jointly implemented by the University of the Philippines and the Department of Science and Technology as part of the Kyushu Institute of Technology-led multinational second Joint Global Multi-nations Birds Satellite (Birds-2). Maya-1 was the first nanosatellite of the Philippines.
The domain of international space politics gained significant traction during the Cold War. This was largely fuelled by the ongoing space race between the USA and the USSR. At this time in history, space exploration was an endeavour largely restricted to the global superpowers and seemed out of reach for many smaller, developing, nations to actively participate in. Subsequently, public concerns for the cost of research and development into novel space technologies did not receive sufficient policy and academic attention in Africa. As the Cold War reached its conclusion, political power began to diffuse across the world, and this led to many smaller nation states developing national and regional space capabilities. In the context of Africa, Nigeria, Algeria, Egypt and South Africa were the front-runners in terms of investments into space-related research and development.
